Improvement in molding covers of cook-stoves



UNITED STATES PATENT OEEicE.

GEO. GARDNER, OF TROY, NEWv YORK.

IMPROVEMENT IN NIOLDING COVERS OF COOK-STOVES.

Specification forming part of Letters Patent No. 23,022, dated February 22, 1559.

To @ZZ whom t may concern,.-

Be it known that I, GEo. W. GARDNER, of the city of Troy, in the county of Rensselaer and State of New York, have invented a new and useful Improvement in Patterns for Molding the Recesses in the Covers of Cool-Stoves5 and I do hereby declare the following to be a full and exact description of the same, reference bein ghad to the accompanying drawings, and to the letters and marks thereon.

In casting thecovers of cookstoves in order that the recesses in them should have suitablyformed projections, under which the lifter can be inserted, it has been customary to use small detachable pieces in connection with the main pattern of the cover, these detachable pieces being used to make the necessary depression in the sand, by which would be formed the projections ofthe recess. In molding with these detachable pieces no degree of carefulness is vsufiicient to produce perfectly smooth surfaces, for the reason that in taking the patterns from the sand it will be more or less disturbed, and unevenness of Asurface result.

The object of .my invention is to produce by casting a recess with the necessary projections for the lifter, which shall be smooth and of even surface, and thus improve and render more useful this feature or part ot' the cover; and my invention consists in combining` with that part of the pattern which gives form to the recess pivoted projections or lips, whereby forni may be given to the projections of the recess for thelifter and the molding of the pattern be conveniently and rapidly performed. j

By tlicdrawings forming part of this speciiication are shown by Figure 1 a top view of a cover, by Fig. 2 a bottom or under side view of a pat-tern, and by Fig. 3 an upper side or top view ofa pattern with one of the pointed projections only.

In Fig. l, a marks the recess, and b Zithe projections for the lifter. In Fig. 2, a also marks that part of the pattern which gives forni to the recess, and c c mark the pivoted projections or lips for forming the lifter projections,

that projection marked c being shown turned inwardlyin the position in which it makes its impression on the sand, and that marked c being turned outwardly, or in the position in which it does not project upon the sand. In Fig. 3 the recess is also indicated by a and the projection c only shown. Y

In carrying my invention into practice the pattern is molded in the usual way with the usual handling of the mold-board and the cope and nowel parts of the flask or box, 4the pivoted projections c and c being turned outwardly from the recess of the pattern, asis represented by c', Fig. 2 of the drawings. The elevation of the sand for :forming the recess in the cover is then without any impression of the projections c and c. Upon removing the cope ofthe flask and exposing the pattern it is only necessary to seize the pin e of each projection and turn them upon the sand, when the impression will be fully and completely made for forming the projections of the recess of the cover. The pivoted projections of the pattern make upon the sand a very smooth impression, and the cover,when cast, will have a very smooth and perfect recess with iirin and durable projections for the lifter.

Having thus set out my invention, what I claim as new, and desire to secure by Letters Patent, is-

Combining with that part of the pattern l which gives form to the recess of the cover the pivoted projections, as and for the purposes herein set forth.

G. W. GARDNER.

Witnesses:

GEO. A. VELLs, J. H. KELLOGG. 

